Hot-air furnace



(No Model.)

T.G.NEAL. HOT AIR FURNACE, &c.

No. 605,329. Patented June 7,1898.

THE upnms PETERS co, PHOTO-LITNCL, WASHINGTON, :1. c.

IAJTJENT FFlCE.

ort-AIR FU RNAC ,&Q.

SPECIFIQATIOM forming part of Letters Patent No. 605,329, dated June 7, 1898.

To all whom it may concern:

Be it known that I, THOMAS G. NEAL, a' citizen of Canada, (but having declared my intention to become a citizen ofth'e United States,) residing at lVarren, in the county of YVarren and State of Pennsylvania, have iu vented new and useful Improvemeutsin Hot- Air Furnaces, '&c., of which the following is a specification.

My invention relates to improvements in hot-air furnaces for heatingcurrents of air to be conducted to the apartments of houses.

The invention relates more particularly to that class of furnaces employing gas, either natural or artificial, as a combustion, but with slight obvious changes isjequally applicable for use in furnaces employing other combustible material, such as coal, oil, and the like.

My invention consists in a novelconstruction and arrangement of the air-dues with relation to the heating-drum and heat-radiators, whereby a large heating-surface is presented to the incoming cold air and the same" is thoroughly heat-ed before passing out of the furnace to the hot-air flues.

My invention further consists in a novel construction of furnace-door, wherebyair is conducted into the top of the combustion-. chamber to aid in procuring a more perfect combustion.

My invention further consists in certain details of construction and arrangement of parts,

all of which will more fully hereinafter ap the furnace, which is made of sheet metal.

This casing is made double-that is, it has an outer wall a and an inner wall a, arranged to form an air-space a between them. Arranged centrally within the casing A is the firebox or combustion-chamber B and the heating-1 drum 0, which parts maybemade in one, as

shown. The casing A and combustion-cham-- ber B are suitably mounted and supported at their bottoms on brickwork D in such manner as to provide an air-chamber (1, connect Application filed November 11, 1897. Serial No. 658,166. illo model.)

I ing with an air-inlet passage d" beneath the furnace, the bottom of. the casing A being open to admit air into the furnace to be heated. V

Surrounding the heating-drum O is a radiator E, an annular air-space e being provided between the drum and radiator, Within which space and extending fromthe top to the bottom thereof are arranged a series of deflectors or retarders G'. An outlet 0 connects the heating-drum O with the radiator E. A deflector c, secured to the interior of the heating-drum before the outlet 0 and extending upward toward the top of the drum, compels the heated products of combustion to rise to a point near the top of said drum and pass over the'deflector before issuing from the outlet 0. Surrounding theradiator E is a second radiator F, an annular air-space e being provided between the two radiators. An outlet f connects radiator E with radiator F. Extending vertically between 'the Walls of the radiator E frorntop to bottom thereof is a partition f", which is locatedbetween the outlets c and f in such manner that heated products of combustion issuing into radiator E through outlet 0 from the heating-drum have to pass entirely around withinsaid radiator to the other. sideof Arranged spirally within the annular space between the radiators E and F and extending from. the top to the bottom thereof are a series of deflectors or retarders G for the currents of air, which are secured at their tops partition 'f before issuing through outlet f.

and bottoms by iron plates g, secured in any secured to the combustion-chamber, and may further be braced laterally, if found necessary or desirable, by any suitable means. (Not shown.)

An outlet hleads from the radiatonFto the chimney, and a vertical partitionz', simi lar to and operating in the same manner as the partitionf; is secured inthe radiator F between'the outlets f and h.

Supported in the bottom of the comb ustionchamber B is the gasburner II, which may be of any preferred construction and is controlled by the valves 7L. An air-regulator I side of the casing.

leads through the casing to the combustionchamber to control the amount of air supplied thereto...

The letter J indicates my improved door, which is hollow and closed at the bottom and open at the top, as indicated at j. Near the bottom of the door are draft-openin gs j.

Supported within the furnace in any suitable manner, as by making the same integral with or otherwise securing it to the combustion-chamber B, is a flat flue K, which is as wide as the inner side of the door J, one open end of which registers wit-h'the opening in said door and the other open end of whichextends into the combustion-chamber near the top thereof. Air entering the draft-openings j passes upward and out of the opening j through the flue K and enters the combustionchamber at the top thereof, where it aids in securing a more perfect combustion of the gaseous products. By this arrangement the cold air passing through the door and out at its top will also tend to keep the casing above the door cool.

On the dome of the heating-drum I may place a water-pan L, connected by a pipe l with a water-pan feed Z, located on the out- In the top of casing A may be provided a water-pan cover M.

The letters N- N indicate the valved outlets for the'heated air issuing from the furnace, to which are attached the fines leadin to the different apartments of a house.

The operation of the device has been sufiicientlyindicated in the description to render it clear. It maybe stated, however, that cold air being deflected to take a circuitous route between the two heat-radiators E and F by means of the deflectors G will be exposed to a very large heating-surface and will issue from the furnace in a highly-heated condition. By arranging the vertical partitions f t between the outlets, as described, I also insure that the heated products of combustion, shall impart the greater part of their energy i to the cold air before leaving the furnace.

Vhile I have shown and described two radiators, I wish it understood that I may employ any given number, according to the requirements of the case.

It will be noted that the outlets e, f, and h are located in the lower portions of the radiators, whereby an indirect circulation of the products of combustion is provided and the heating capacity of the furnace greatly increased.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, 'is

1. In a hot-air furnace, the. combination with the outer casin g and inner heating-drum,

of a plurality of vertically-disposed radiators encircling said drum and each other, a plurality of deflectors circuitously arranged between said radiators, outlets connecting, respectively, the heating-drum with the adjacent radiator and the radiators with each other and an outlet connecting the outermost radiator with the chimney; said outlets being located in the lower portions of said radiators whereby to provide an indirect circulation of the products of combustion, substantially as described.

2. In a hot-air furnace, the combination with the outer casing and inner heating-drum, of a plurality of vertically-disposed radiators encircling said drum and each other, a plurality of deflectors circuitously arranged be tween said radiators, outlets connecting, re:

spectively, the heating-drum with the adjacent radiator and the radiators with each other and an outlet connecting the outermost radiator with the chimney, said outlets being located in the lower portions of said radiators, and vertical partitions in each radiator located between the inlet and-outlet openings thereof, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. i

THOMAS G. NEAL. lVitnesses:

Gno. BALL, A. G. CARROLL. 

